$ cve CVE-2021-1789 JSON

CVE-2021-1789 KEV

8.8

HIGH · CVSS 3.1 · EPSS 14% (pctl 96)

Patch first

On CISA KEV — known exploited in the wild, due 2022-05-25.

Description

A type confusion issue was addressed with improved state handling. This issue is fixed in macOS Big Sur 11.2, Security Update 2021-001 Catalina, Security Update 2021-001 Mojave, tvOS 14.4, watchOS 7.3, iOS 14.4 and iPadOS 14.4, Safari 14.0.3. Processing maliciously crafted web content may lead to arbitrary code execution.

Scoring

CVSS	8.8 (HIGH, v3.1)
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS	13.98% — more likely to be exploited than 96% of all CVEs
Weakness	CWE-843
On CISA KEV	yes — remediate by 2022-05-25
Public exploit	none known
Published	2021-04-02
Last modified	2026-06-17

CISA KEV

Name	Apple Multiple Products Type Confusion Vulnerability
Added	2022-05-04
Due	2022-05-25
Vendor / product	Apple / Multiple Products
Ransomware use	none reported

Affected (8)

Vendor	Product
apple	ipados
apple	iphone os
apple	mac os x
apple	macos
apple	tvos
apple	watchos
fedoraproject	fedora
webkitgtk	webkitgtk

References

→ the Explorer · watch your stack · NVD